Characteristics and applications of polypropylene spunbond nonwovens
Polypropylene spunbond non-woven fabric: After the polymer is extruded and stretched to form continuous filaments, the filaments are laid into a web, and the web is then self-bonded, thermally bonded, chemically bonded or mechanically reinforced The method is to turn the fiber web into a non-woven fabric.
Material: Polypropylene (PP)
Polypropylene is a kind of polymer commonly used in the spinning process. The main performance parameters are isotacticity, melt index (MFI) and Ash.
The isotacticity of polypropylene is required to be above 95% in the spinning process, and spinning is difficult if it is less than 90%.
During the polymerization process, three configurations of polymers can be produced due to the different positions of methyl groups in the steric space.
Features: high strength, good high temperature resistance, aging resistance, UV resistance, high elongation, good stability and air permeability, corrosion resistance, sound insulation, moth-proof, non-toxic.
Technical process: polymer (polypropylene + return material) - large screw high temperature melt extrusion - filter - metering pump (quantitative conveying) - spinning (up and down stretching at the entrance Suction) - cooling - air traction - net curtain forming - upper and lower pressing rolls (pre-reinforcement) - rolling mill hot rolling (reinforcement) - winding - reverse distribution and slitting - weighing and packaging - finished product Storage
Technical characteristics of spunbond non-woven fabrics
1. High production capacity
2. Good mechanical properties of products
3. Low production cost
4. Production is easy to manage
Product features
Generally, the two-way fastness is good, and the rolling point of the general spunbond non-woven fabric is The characteristics of diamond shape, wear resistance, firm feel and so on make it the best choice for making this kind of products.
Technology type
The world's spunbond non-woven technologies mainly include Lacoffel technology from Reifen, Germany, STP technology from Italy, and Kobe Steel technology from Japan. The current situation, especially with Reffin technology becoming the mainstream technology in the world. It has now developed to the fourth generation of technology. It is characterized by the use of negative pressure ultra-high-speed air drafting, and the fiber can be stretched to about 1 denier.
Applications:
Apparel: Garment lining, winter thermal insulation materials (ski shirts, quilts, inner cores of sleeping bags), work clothes, surgical gowns, protective clothing, suede materials, Clothing accessories
Daily necessities: non-woven bags, flower packaging cloth, luggage cloth, home decoration (curtains, furniture covers, tablecloths, sofa beds, window covers, wall coverings), acupuncture chemical fibers Carpets, coating materials (artificial leather)
Industry: filter materials (chemical raw materials, food raw materials, air, machine tools, hydraulic systems), insulating materials (electrical insulation, thermal insulation, acoustic insulation), papermaking blankets, Car shell, carpet, car seat, inner layer of car door
Agriculture: roof material for greenhouse (agricultural hotbed)
Medical and hygiene: non-wrap medical, wrap-up medical, other hygiene Civil engineering: geotextiles
Construction: rainproof materials for roofs and sheds Military: breathable anti-virus suits, anti-nuclear radiation suits, inner layer of space suits, military tents, war emergency room supplies
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